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The article designed a military grade switchboard with Gigabit POE power capacity through 5 ports by researching switch principle and actual requirement. Firstly, the whole circuit and associated systems were introduced. Secondly, the circuit which used network management chip 88E6161 of Marvel Company and microcontroller chip PD69104B of Micro-semi Company was designed and emulated, the specific...
This paper presents a 28.1GHz ultra-low-power down-conversion sub-harmonic mixer (SHM). Two novel circuit topologies are proposed. First circuit introduces an AC-DC signal splitting LC-tank based on the conventional mixer. By utilizing the LC-tank, the resistor for small signal is enhanced and just one stage transistor exists between a voltage supply (VDD) and ground (GND). A Single-NMOS switch is...
This paper addresses mainly the problem of private data protection in network communication against eavesdropping attacks. As this kind of attacks is stealthy and untraceable, it is barely detectable for those feature detection or static configuration based passive defense approaches. We propose a Moving Target Defense(MTD) method by utilizing the protocol customization ability of Protocol-Oblivious...
Many approaches have been suggested for data centers to balance the traffic load nowadays. Both the network topology and routing algorithm can affect the quality of the network communication. Recently, a new network architecture named fat-tree becomes one of the most widely used topologies for data center networks. The routing algorithms, such as global load balancing (GLB) and dynamic load balancing...
In 2011, a composite insulator in Shenzhen suffered fracture. Through infrared thermal test along the same and neighbor lines, 517 out of 1327 insulators presented with up to or over 0.5°C thermal increase. Early researches demonstrated that humidity was a factor to have effect on heating performance. In order to understand the potential mechanism of heating and provide precaution suggestions, we...
In this paper, the method of reducing the rise time of high-voltage pulse transformer output rectangular pulses using a magnetic compression switch has been studied. An equivalent circuit consisting of pulse transformer and magnetic switch was used to describe the behavior of a transformer operating with magnetic switch. Meanwhile, four simplified equivalent sub-circuits and corresponding differential...
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